Rotary spark-gap machine.



(1H. TEALL.

ROTARY SPARK GAP MACHINE. AFPLlcAnoN min 1AN,1a.19|6.

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oAnY SPARK GAP'MAcHmE. APPLIATION EILED JAN. I8. i916.

Patented D.'18,1917.

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INVENTOR G. H.2TEALL.

RGTARY SPARK GAPMACHINE.

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INVENTQR if. BY. i

WH'NESSES ATTRNEY Vaerials of the wireless witho'ut'decreaslngv "ispa'tia'lly closed or i 'terposition of 'a rotating conductorcarrying CLARENCE H. TEALL, F DETROIT, MICHIGAN.

ROTARY SPARK-GAP MACHINE.

Specification of Letters Patent.

Patented Dec. 18, 1917.

Application l1led'January 18, 1916. Serial No. 72,780.

"fi/cation.' i

V1' This invention relates to a rotary spark gapmpchine 'particularly adapted for use inconnection with a wireless apparatus. j One object of the present invention reside;l

inthefprovisionof a machine of the above 4mentioned character, wherein the spark gap diminished by the ina plurality of sparking points. Thus the gap area is reduced and at the same timel this permits'an Vincrease in the osclllatlons` or surging of the current delivered to the the eiciency of the gap.

the said rotary 35v A further object consists. in so arranging conductor .that it forms part :of a rotor of a motor, the stator of which is located within and concentric with said Vconductor and thus the latter may be driven at any suitable speed by the motor embodied Iwithin the device.

lVith the aboveand proceed tordescrbe a specific embodiment of my nventionand which I have illustrated -in lthe accompanying drawings wherein: v

Figure 1 is a side elevation 'of the machine. Fig. 2 is a transverse section on the line 2-2 of Fig. l1, and

Fig. 3 is a Vdiagrammatic view showing the installation of thedevice in connection with a wireless apparatus.

In detail:

The device, as shown, comprises abase l having mounted thereon the two posts 2 and 3, each of which is insulatedfrom the base 1 by an nsulatinbase 4 of suitable thick` ness; 'Each ofV tlie posts 2 and 3 is provided with a binding post screw 5 receiving a nut 6 by means of which the terminals of the wire may be clamped in place. The upper ends of said posts 2 and 3 are each videdwith gap screws 7 carrying spark y ntsfand knurled knobs 10 by which the said points 8 may be adjusted to and from each other.

Centrally located with respect to the osts `2 and'B and transversely positioned with recoil is con nested' other objects in view,2

' is mounted a 4 around.

the plane of the points 8 of the rotor and are but slightly' spaced.V

spect to said 12 cach insulated from the base 1 by insulating plates 13. Fixed inthe upper ends of the uprights 11 and 12 is the hollow shaft 14 which carries cores'15 and 16 about which are wound coils 17 and 18. Th-e upright 12 is provided with brush holders 19 and 20, 4each recessed as shown at 21 to hold brushes 22 behind which are disposed springs 23. One terminal 24 ot the coil 17 is connected to one of the brushes 22; whereas, the other terminalV of the same coil is connected with one pole of an extraneous source of current; likewise, one terminal 26 of coil 18 is connected with thc other brush. 22; whereas, the other terminal 27 ot same with the remaining pole of the same source of current and thus the stator is formed and connected.

The rotor comprises a ring 28 carrying radially and inward-lv extending ironcores 29 about which is coiled a desired length of wire 30, thus forming a plurality of'series wound coils. The saidI ring 28 is rotatably supported on thc hollow diametrically positioned members 31 and 32 each of \vhich is insulated from ring 28 by the insulation piece 33; said members are secured in position by screws 34 and are lo cated relatively opposite `each other. The member 31 is provided with a centrally7 located journal box 35 which receives theshaft he commutator 36 comprises two sections 39 and 40, the former of which is in conn'ec` tion with one'end 41V of the wire 30, and the latter of which is in connection vwith the end 42 of wire 30. Thus a motor is formed having an exterior stator.

Surrounding the ring 28 isan annular insulating ring 43 on the periphery of which conducting ring 44- having sparking points 45 equally spaced theren Such sparking points 45 travel in during the rotation therefrom by the dielectric medium of air separating the points S from the rotating conductor, and thus the original gap between the points 8 is decreased in areabut the rotating conductor posts, are the uprights 11 and' rotor and anl interior ion spark jumps from one point 8 to the other it materially assisted in its jump by the travel of the current through conductor 44 and the discharge takes place between points 8 and points 45 thereby increasing the eiciency of the gap machine. Y

Een ng pnrlicularly to Fig. 3, the machine hcreinbeifore described, is shown in connection with a wireless apparatus'wherein the primary circuit P induces a current in the secondary circuit,V S which 'Willcause a spark to jump between points A. and B. During the jump, however, the discharge takes 'place only through the dielectric men diurn separating points A and B and is conveyed by the rotating conductor C and thus the offici :icy of the gap is greatly increased and the surging of the ,current in the aerial D is much more pronounced, thus insuring the sending of plainer messages.

hile I have hereinbefore described a specific embodiment, of the present inven tion, it is nevertheless to be understood that in practice, I may resort to such practical modifications as i'ail Within the vscope of the invention as dened in the appended elaiirns.

l. In* a device of the class described, a. spark gap Wheel, a pair of uprightsia shaft mounted -for rotation in said uprights andI supporting said'wlieel, a pair of op} 1t )sitfely\ v disposed brush holders on one of said up rights, brushes in said holders, a pair lof coils carried by said wheel, and one terminal of each of said coils being connected to one of said brushes.

2. In' a device of the class described, a'

- supported in said uprights and extending tin-ough said dialnetrical members, the said members being insulated from seidshaft, a, commutator carried by said shaft, andone terminal of each of said coils being connected to the brushes for sai-d oommutator. In testimony whereof I affix my signature in presence of two, Witnesses.,

CLARENCE H. TEALL. Witnees: l'

ALBERT SHEA, .l ELsNoR SHELL? 

